211757349241 has 3 divisors (see below), whose sum is σ = 211757809413. Its totient is φ = 211756889070.

The previous prime is 211757349191. The next prime is 211757349283. The reversal of 211757349241 is 142943757112.

The square root of 211757349241 is 460171.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 211757349241 - 2¹³ = 211757341049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211757349191 and 211757349200.

It is not an unprimeable number, because it can be changed into a prime (211757349341) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 230086 + ... + 690256.

It is an arithmetic number, because the mean of its divisors is an integer number (70585936471).

Almost surely, 2^211757349241 is an apocalyptic number.

211757349241 is the 460171-st square number.

211757349241 is the 230086-th centered octagonal number.

It is an amenable number.

211757349241 is a deficient number, since it is larger than the sum of its proper divisors (460172).

211757349241 is an frugal number, since it uses more digits than its factorization.

211757349241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920342 (or 460171 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The spelling of 211757349241 in words is "two hundred eleven billion, seven hundred fifty-seven million, three hundred forty-nine thousand, two hundred forty-one".